Heres the plan, I'd like to change out my 350 for a 250. I went with the Nova sub frame and 350 with 4spd, two years ago. Now I'm tired of the 350, this is the mystery motor that I've posted about before. So beings I've set up the subframe with V8 motor mounts, I raised the motor and moved it forward. So I'm hoping the 79 250 will drop in or will I need to relocate the motor mounts? Maybe someone out there has tried this and can advise me! Thanks in advance.